Speed-governor for explosive-engines.



Ptent u Jan. 29, l90l.

H.'G. uunenwoon. SPEED GOVERNOR FOR EXPLUSIVE ENGINES.-

(Application filed Apr. 25, 1900.)

' 2 Sheets-Sheet I.

(No Model.) I

THE umems PETERS ca., WASHINGTON, ay 0.

(No Model.)

Patented Jan. 29, I90l. H. G. UNDERWOOD. SPEED GOVERNOR FOR EXPLOSIVE ENGINES.

(Application filed Apr. 25, 1900.)

2 Sheets$heet 2.

Uwrrnn STATES PATENT OFFICE.

HERBERT GEORGE UNDERWOOD, OF YORK, N. Y., ASSIGNOR, BY DI- RECT AND MESNE ASSIGNMENTS, TO THE INTERNATIONAL POWER VE- HIOLE COMPANY, OF VEST VIRGINIA.

SPEED-GOVERNOR FOR EXPLOSlVE'ENGlNES.

SPECIFICATION forming part of Letters Patent No. 666,828, dated January 29, 1901.

Original application filed December 14, 1899, Serial No. 740,326. Divided and this application filedApril 215, 1900. Serial No.

14.1297- Ql'o model.)

To a whom it may concern:

Be it known that I, HERBERT GEORGE UN- DERWOOD, a citizen of the'United States, re-

siding in the borough of Manhattan, in the city, county, and State of New York, have invented'certain new and useful Improvements in Speed Controllers and Governors for ExplosiVeEugines, of which the following is a specification.

to My invention has for its object to provide means whereby the amount of a liquid hydrocarbon fed to an explosive-engine may be varied by an attendant for varying the speed of such engine and be automatically varied by r 5 the engine for governing the speed thereof,

so that the attendant may set the controlling apparatus for any speed within the limits of the engineand so that such speed when attained by the engine will be automatically 2o kept constant by the governor.

For the purposeof accomplishing the object above set forth my invention coiisists in the construction, arrangement, and combination of the several parts of which it is composed, as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings,in

which corresponding parts are designated by corresponding marks of reference, Figure 1 is a side elevation of an explosive-engine having my present invention applied thereto.

Fig. 2 is asection on line Z Z of Fig. 4, showing the details of the eccentric-governor.

Fig. 3 is a section taken on line Y Y of Figs.

3 5 2 and 4. Fig. 4. is a transverse section taken on line W W of Figs. 2 and 3.

. While in the accompanying drawings I have shown my present invention as applied to an explosive-engine such .as is described 40 in my other application for patent for improvements in explosive-engines, filed in the United States Patent Ofiice on the lath day of December, 1899, and serially numbered 7 40,326, of which application this present application is a division,

The explosive-engine is provided with an it will'be understoodthat my present invention may be used with explosion-cylinder a and with a main shaft c, carrying one or more fly-wheels (3. At a convenient point, as above the explosion-cylinder, is located a liquid-hydrocarbon reservoir13,conn ected, by means of asuitable pipe 12, with an oil-pump 11, which is in turn 0011- nected with the explosion-cylinder by a pipe 19. A plunger 18 is provided for the pump, the plunger being actuated by a rod 21, pivoted thereto and connected with a lever 22,

pivoted'at23 on the engine-frame. The lower end of the lever carriesa roller-tappet24, adapted to be actuated by acam or eccentric 25, revolving with the main crank-shaft c and carried on the hub 26 of the flywheel 6. The eccentric consists of a circular hub 25, having an elongated slot 25 therein, and p a weighted tailpiece rigidly secured thereto in a line with the major axis of the slot. The hub 26 of the flywheel is contained within the slot 25 andthe. tailpiece is provided with: a guiding-tongue 28, entering into a recess 29 in the rim of the fly-wheel and being pressed by a spring 30, the tension of which may be adjusted by the screw 31.

In the operation of the engine at the normal speed for which it may be adjusted the spring 30, acting in opposition to the centrifugal force of theweight 27 of the eccentric due to the rotation thereof with. the fly-wheel, holds the eccentric sidewise on the hub at a point intermediate of its movement as permitted by its slot 25", thus giving the eccen trio-hub eccentricity in, respect to the flywheel hub and crank-shaft, whereby on each revolution of the crank-shaft the roller 24: on the lower end of the lever 22 will be forced rearwardly, actuating, through the lever 22 and rod 21, the plunger 18 to make its driviug stroke. The return stroke of the plunger is effected by a'retractile spring 32 when permitted by the further rotation of the eccentric. Upon a decrease of speed of rotation of the fiy-wheel-due to any cause the centrifugalforce of the weight upon the eccentric becomes reduced and is overcome to a come sponding extent by the force of the antagonistic spring 30, so that the eccentric is shifted radially upon the fly-wheel and the eccentricity by the eccentric.

of its hub increased to a corresponding extent, giving a longer stroke to the oil-pu mp plunger and increasing the amount of explosive material furnished to the explosive-en gine. In a similar manner upon anincrease in the speed of the engine the centrifugal force of the weight increases and overcomes the spring 30 to a sufiicient extent to move the eccentric upon the fly-wheel in the opposite direction, thereby reducing the eccentricity and the length of stroke of the pumpplunger. As shown in Figs. 2 and 3, the hub of the fly-wheel has a collar 33 secured thereto concentric with the crankshaftand upon which the roller 24 runs except when thrown The parts are so proportionate that upon an excessive speed of. the engine the eccentric will be shifted, as before described, to an extent suihcient to cause the eccentric-hub not to project at any point beyond the collar 33, whereby as the roller-tap; pet will then run upon the collar 33 no im pulsewill be imparted to the pump-plunger until the speed of the engine has been so far out down as to again permit the eccentric-hub to project beyond the collar.

In Figs. 2, 3, and 4 I have shown the eccen--' trio and weight connected therewith as mounted on the fly-wheel by means of pivoted links 34, and in this case the tongue 28. may be disconnected from the eccentric-tail, as it is not necessary that the weight should be guided thereby.

I thus provide'governing means for automatically holding the speed of the engine constant for the by the attendant, and for the purpose of readily adjusting the engine for difierent speeds (which when attained will be held constant by the governor beforedescrib'ed) I provide means whereby the amount of oil supplied to v the engine may be varied at the will of the operator, thus permitting him to vary the speed of the engine, and for this purpose I form a slot 35 in thelever 22, connecting the rod 21 to the lever at the slot in the latter, and attach to the rod a link 36, having a threaded upper'end, on which a nut 37, having a roughened edge, works, whereby as the nut is tu rned the point of attachment of the rod to the lever may bevari'ed, being moved toward or from the roller 24 on the end of the lever, efiecting a corresponding change in the throw of the pump-plunger and in the quantity of oil dis charged thereby into the engine-cylinder. A spring 38 is arranged in proximity to the'nut and is adapted to engage in the roughened edge thereof to hold it in the position in which it may be set.

- Having thus described my invention, what I claim isv 1-. In a governor for explosive-engines, the combination with a shaft driven by the engine, of a collar concentrically mounted upon the shaft, an eccentric rotating with and mounted to move radially in respect to the shaft un der the influence of centrifugal force, a pump concentric-collar for an pplying a liquid hydrocarbon to the en gine, and a t-appet, actuating the pump and thrown by the eccentric, or resting upon the on the shaft, according to the radial position of the eccentric, substan-' tially as described.

2. In a governor for explosive-engines, the combination with an eccentric, consisting of a slotted circular hub driven by' the engine, passing through the slot in the eccentric and rotating the eccentric, a collar mounted concentrically upon the shaft, a spring for normally holding the eccentric radially upon the shaft in opposia tion to the centrifugal force of the weighted tailpiece, a pump, supplying a hydrocarbon to the engine,

:for normally holding the eccentricradially upon-the shaft in opposition to centrifugal force, and a pump, carbon to the engine, actuated by the rotation of the eccentric and according ,to the position thereof, substantially as described. speed at which it may be set 'n'ular flange on the wheel, links, having their opposite ends pivoted to the wheel and to the eccentric. to guide the latter, a spring-pressed pin mounted in'the flan'ge'of the wheel and and a weighted tailpiece rigidly connected together, a shaft,

and a tappet actuating .thepump and thrown by the eccentric or resting" supplying a liquid hydro- IIO bearing upon the tailpiece to move the eccentric radially on the hub in opposition to the centrifngal force of the weighted tailpiece, a pump, supplying a hydrocarbon to the engine, and 'atappet actuating the'pump and thrown by the eccentric or resting upon the concentric collar on the shaft, according to the radial position ofv the eccentric, substantially as described.

5. In aspeed varying and controlling device for an explosive-engine, the combination with a shaft driven able eccentric rotating with the shaft and the position of which in respect to the shaft varies with the speed of the engine, a pivoted slotted lever, a tappet upon thesaid lever thrown by the eccentric and according to the position thereof, a pump, supplying a liquid hydrocarbon tothe engine, a pump-plunger, a rod pivoted to the pump plunger, and engaging the slot in the lever, a link, supporting the rod, and a nut upon the end of the link,whereby thepoint of attachment between rod and lever may be changed and the quantity of oil fed upon each stroke of the pump varied, substantially as described.

6. In a speed-controlling device for an explosive-engine the combination with a pivoted slotted lever rocked by the movement of the engine, a pump-plunger, a rod pivoted to the pump-plunger, and engaging the slot in.

the lever, a link supporting the rod, and a nut upon the end of the link, whereby the point of attachment between rod and lever may be changed and the quantity of all fed upon each stroke of the pump varied, substantially as described.

- HERBERT GEORGE UNDERWOOl).

In presence of-- GEO. W. MERCER,

SAMUEL G, FRANKLIN. 

